Welcome to the forum!
You need a proper test kit. I suggest the
TF-100/Pro or Taylor K2006C. A proper test kit is needed to get the accurate water chemistry results needed to follow the TFP protocols. Once you get a full set of pool water chemistry results, post them here and we can provide guidance on a path forward.
I suggest you read through
Pool Care Basics - Trouble Free Pool and even look at a few of our videos
TFP-TV - Trouble Free Pool